U.S. patent application number 10/192183 was filed with the patent office on 2003-07-24 for back plate removing jig.
Invention is credited to Ma, Hao-Yun.
Application Number | 20030135992 10/192183 |
Document ID | / |
Family ID | 21688373 |
Filed Date | 2003-07-24 |
United States Patent
Application |
20030135992 |
Kind Code |
A1 |
Ma, Hao-Yun |
July 24, 2003 |
Back plate removing jig
Abstract
A removing jig includes a shaft (10) having a first end (11) for
abutting a motherboard (60) on which a back plate (50) is mounted
and having a second end (12), a stationary hub (25) fixedly mounted
on the shaft near the first end, a sliding hub (20) slidably
mounted around the shaft between the second end and the stationary
hub, and a plurality of claws (30) each including a finger (32) and
a rib (33). Each finger has a free end (32a) having a catch (34),
and a fixed end (32b) pivotably secured to the sliding hub. One end
of each rib is pivotably secured to the stationary hub, and an
opposite end is pivotably secured to the finger. When the sliding
hub is moved toward the second end, the catches of the claws firmly
clasp the back plate and pull the back plate away from the
motherboard.
Inventors: |
Ma, Hao-Yun; (Tu-Chen,
TW) |
Correspondence
Address: |
WEI TE CHUNG
FOXCONN INTERNATIONAL, INC.
1650 MEMOREX DRIVE
SANTA CLARA
CA
95050
US
|
Family ID: |
21688373 |
Appl. No.: |
10/192183 |
Filed: |
July 9, 2002 |
Current U.S.
Class: |
29/762 ;
29/758 |
Current CPC
Class: |
Y10T 29/53257 20150115;
Y10T 29/53274 20150115; B25B 27/00 20130101; B25B 27/02
20130101 |
Class at
Publication: |
29/762 ;
29/758 |
International
Class: |
B23P 019/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 18, 2002 |
TW |
91200432 |
Claims
1. A removing jig adapted for removing a back plate from a
motherboard, the jig comprising: a shaft having a first end adapted
for abutting the motherboard, and a second end opposite to the
first end; a stationary hub fixedly mounted around the shaft near
the first end; a sliding hub slidably mounted around the shaft
between the second end and the stationary hub; and at least two
claws each comprising a free end and a fixed end, the fixed end
being pivotably secured to the sliding hub, wherein when the
sliding hub is moved toward the second end of the shaft, the free
ends are moved toward the shaft and then toward the second end,
whereby the at least two claws clasp the back plate and pull the
back plate away from the motherboard.
2. The jig as claimed in claim 1, wherein each of the claws
comprises a finger and a rib, the free end and the fixed end are
respectively formed in the finger, one end of the rib is pivotably
secured to the stationary hub, and an opposite end of the rib is
pivotably secured to the finger.
3. The jig as claimed in claim 2, wherein each of the fingers has a
catch formed on the free end thereof for clasping the back
plate.
4. The jig as claimed in claim 1, wherein a plurality of retaining
holes is defined in the shaft in the vicinity of the first end, and
the stationary hub is secured on the shaft by a pin being
selectively inserted into one of the retaining holes according to a
size of the back plate.
5. The jig as claimed in claim 1, wherein the sliding hub is
generally T-shaped, and has a handlebar formed on one end thereof
adjacent the second end of the shaft.
6. The jig as claimed in claim 1, wherein a plurality of pairs of
first tabs is formed on one end of the sliding hub adjacent the
first end of the shaft, each of the first tabs defines a first
through aperture, the fixed end of each of the fingers is disposed
between a corresponding pair of first tabs, and a screw extends
through the first through apertures and the fixed end and engages
with a nut thereby pivotably securing the finger to the sliding
hub.
7. The jig as claimed in claim 2, wherein a plurality of pairs of
second tabs is formed on the stationary hub, each of the second
tabs defines a second through aperture, said one end of each of the
ribs is disposed between a corresponding pair of second tabs, and a
screw extends through the second through apertures and said one end
and engages with a nut thereby pivotably securing the rib to the
stationary hub.
8. The jig as claimed in claim 1, wherein a circular handle is
formed on the second end of the shaft.
9. A removing jig removing a back plate from a motherboard on which
the back plate is fixed, the back plate comprising concave surfaces
around a perimeter thereof and an opening defined in a center
thereof, the jig comprising: a shaft having a first end extending
through the opening to abut the motherboard, and a second end
opposite to the first end; a stationary hub fixedly mounted on the
shaft near the first end; a sliding hub slidably mounted on the
shaft between the second end and the stationary hub; and a
plurality of fingers and ribs, each of the fingers having a free
end and a fixed end, the fixed end being pivotably fixed to the
sliding hub, each of the ribs having one end pivotably fixed to the
stationary hub and an opposite end pivotably fixed to a
corresponding finger, wherein when the sliding hub is moved toward
the second end of the shaft, the free ends of the fingers are
radially moved toward the shaft to clasp the back plate and pull
the back plate away from the motherboard.
10. The jig as claimed in claim 9, wherein the shaft defines a
plurality of retaining holes in the vicinity of the first end, and
the stationary hub is fixed to the shaft by a pin being selectively
inserted into one of the retaining holes according to a size of the
back plate.
11. The jig as claimed in claim 9, wherein a plurality of pairs of
first tabs is formed on one end of the sliding hub adjacent the
first end of the shaft, each of the first tabs defines a first
through aperture, the fixed end of each of the fingers is disposed
between a corresponding pair of first tabs, and a screw extends
through the first through apertures and the fixed end and engages
with a nut thereby pivotably fixing the finger to the sliding
hub.
12. The jig as claimed in claim 11, wherein the sliding hub is
generally T-shaped, and has a handlebar formed on an opposite end
thereof adjacent the second end of the shaft, the handlebar
opposing the first tabs.
13. The jig as claimed in claim 11, wherein a plurality of pairs of
second tabs is formed on the stationary hub, each of the second
tabs defines a second through aperture, one end of each of the ribs
is disposed between a corresponding pair of second tabs, and a
screw extends through the second through apertures and said one end
and engages with a nut thereby pivotably fixing the rib to the
stationary hub.
14. The jig as claimed in claim 9, wherein a circular handle is
formed on the second end of the shaft.
15. In combination, a printed circuit board defining a plurality of
holes; a back plate closely positioned under the printed circuit
board and defining a plurality of posts engaged within the
corresponding holes, respectively, and an opening therein; a tool
including: a shaft defining an upper end extending through said
opening and abutting against an underside of said printed circuit
board; and at least two opposite grasping fingers each with one
lower end up and down moveable along an axial direction of said
shaft and an opposite upper end sweeping laterally and grasping a
corresponding lateral edge of said back plate when said lower end
is moved to a stop point relative to the shaft; wherein a further
downward movement of said lower end relative to the shaft results
in significantly spacing said printed circuit board and said back
plate away from each other, and associatively disengaging the posts
from the corresponding holes.
16. The combination as claimed in claim 15, wherein the lower end
of each of said fingers is pivotally fixed to a sleeve slidably
axially moved along said shaft.
17. The combination as claimed in claim 15, wherein each of said
fingers is pivotally moved about a pivot point between the lower
end and the upper end.
18. The combination as claimed in claim 17, further including a rib
with thereof an upper end pivotally fixed to the shaft and an
opposite lower end pivotally fixed to said pivot point.
19. The combination as claimed in claim 15, wherein said stop point
is for a downward movement of said lower end.
20. The combination as claimed in claim 19, wherein said upper end
sweeps laterally and inwardly when said lower end is moved toward
the stop point.
21. In combination, a printed circuit board defining a plurality of
holes; a back plate closely positioned under the printed circuit
board and defining a plurality of posts engaged within the
corresponding holes, respectively, and an opening therein; a tool
including: a shaft defining an upper end extending through said
opening and abutting against an underside of said printed circuit
board; and at least two opposite pivotal grasping fingers each
defining a pivot point between lower and upper ends thereof, said
upper end sweeping laterally inwardly and grasping a corresponding
lateral edge of said back plate when said lower end makes a
relative outward movement about said pivot point; wherein once the
fingers grasp the back plate, a downward force is applied to the
grasping fingers and results in significantly spacing said printed
circuit board and said back plate away from each other, and
associatively disengaging the posts from the corresponding holes.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to removing jigs, and
particularly to jigs for readily removing back plates from
motherboards.
[0003] 2. Related Art
[0004] Computer electronic devices such as central processing units
(CPUs) frequently generate large amounts of heat, which can
destabilize operation and cause damage. A heat sink placed in
thermal contact with an electronic device transfers heat from the
electronic device through conduction. Modern heat sinks are being
made larger and larger. Therefore, a back plate is often attached
on an underside of a motherboard below an electronic device mounted
on the motherboard, for reinforcing the motherboard.
[0005] Conventionally, a plurality of posts is formed on a back
plate. Free ends of the posts are secured to a motherboard by
welding means or by interferential engagement. The back plate is
thus mounted to an underside of the motherboard. Much force is
required to remove the back plate from the motherboard. Oftentimes,
removal is performed by hand or with a screwdriver. This is unduly
laborious and troublesome. Furthermore, there is a high risk of
damage to the back plate and components adjacent the back
plate.
[0006] It is strongly desired to provide a jig for removing back
plates from motherboards which can overcome the abovementioned
problems.
SUMMARY OF THE INVENTION
[0007] Accordingly, an object of the present invention is to
provide a removing jig for readily removing a back plate from a
motherboard.
[0008] To achieve the above-mentioned object, a removing jig in
accordance with the present invention includes a shaft, a
stationary hub, a sliding hub, and four claws. The shaft comprises
a first end for abutting a motherboard on which a back plate is
mounted, and a second end opposite to the first end. The stationary
hub is fixedly mounted on the shaft near the first end. The sliding
hub is slidably mounted around the shaft between the second end and
the stationary hub. Each claw comprises a finger and a rib. The
finger comprises a free end having a catch, and a fixed end
pivotably secured to the sliding hub. One end of the rib is
pivotably secured to the stationary hub, and an opposite end of the
rib is pivotably secured to the finger. When the sliding hub is
moved toward the second end of the shaft, the free ends of the
fingers are moved toward the shaft. The catches of the claws firmly
clasp the back plate. The free ends of the fingers are moved toward
the second end, and the catches of the claws pull the back plate
away from the motherboard.
[0009] Other objects, advantages and novel features of the present
invention will be drawn from the following detailed description of
a preferred embodiment of the present invention with attached
drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is an exploded perspective view of a back plate
removing jig in accordance with the present invention, together
with a motherboard and a back plate;
[0011] FIG. 2 is similar to FIG. 1, but showing the jig fully
assembled and engaged with the back plate;
[0012] FIG. 3 is a side elevational view of FIG. 2, showing the
back plate and motherboard in cross-section; and
[0013] FIG. 4 is similar to FIG. 3, but showing the jig removing
the back plate from the motherboard.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0014] Referring to the attached drawings, FIG. 1 shows a jig in
accordance with a preferred embodiment of the present invention
together with a back plate 50 and a motherboard 60. The jig
comprises a shaft 10, a T-shaped sliding hub 20, a stationary hub
25, and a plurality of claws 30. In the preferred embodiment, there
are four claws 30.
[0015] The shaft 10 comprises a first end 11, and a second end 12
opposite to the first end 11. A plurality of retaining holes 14 is
defined in the shaft 10 close to the first end 11. The retaining
holes 14 are arranged in a line along a length of the shaft 10. A
circular handle 16 is perpendicularly formed on the second end 12
of the shaft 10.
[0016] The sliding hub 20 is slidably mountable around the shaft 10
in the vicinity of the second end 12. A handlebar 22 is
perpendicularly formed on one end of the sliding hub 20, adjacent
the handle 16 of the shaft 10. Four pairs of first tabs 26 are
formed on a circumferential surface of an opposite end of the
sliding hub 20, opposing the handlebar 22. The four pairs of first
tabs 26 are evenly spaced apart. A pair of aligned first through
apertures 262 is respectively defined in each pair of first tabs
26. Four pairs of second tabs 28 are formed on a circumferential
surface of the stationary hub 25. A pair of aligned second through
apertures 282 is respectively defined in each pair of second tabs
28. A pin 27 is for fixedly attaching the stationary hub 25 to the
shaft 10.
[0017] Each claw 30 comprises an arcuate finger 32 and a rib 33.
The finger 32 comprises a free end 32a and an opposite fixed end
32b. The free end 32a is bent inwardly to form a catch 34. A first
through hole 36 is defined in the fixed end 32b. A second through
hole 38 is defined in the finger 32, between the fixed end 32b and
a middle portion of the finger 32. A third through hole 311 is
defined in one end of the rib 33. A fourth through hole 312 is
defined in an opposite end of the rib 33. A plurality of screws 70
and nuts 72 are for securing the ribs 33 to the fingers 32, and for
securing the claws 30 to the shaft 10.
[0018] In assembly, the sliding hub 20 is slidably mounted around
the shaft 10 in the vicinity of the second end 12. The stationary
hub 25 is fixedly attached to the shaft 10 by the pin 27 being
selectively inserted into one of the retaining holes 14 of the
shaft 10. One finger 32 is placed between one pair of first tabs
26, with the first through hole 36 of the fixed end 32b being
aligned with the corresponding first through apertures 262. One
screw 70 is extended through the first through apertures 262 and
first through hole 36 to engage with one nut 72. The finger 32 is
thus pivotably fixed to the sliding hub 20. In the same way, the
other fingers 32 are pivotably fixed to the sliding hub 20. One rib
33 is then placed between one pair of second tabs 28 of the
stationary hub 25, with the third through hole 311 of the rib 33
being aligned with the corresponding second through apertures 282.
One screw 70 is then extended through the second through apertures
282 and third through hole 311 to engage with one nut 72. The rib
33 is thus pivotably fixed to the stationary hub 25. In the same
way, the other ribs 33 are pivotably fixed to the stationary hub
25. One rib 33 is then placed next to a corresponding finger 32,
with the fourth through hole 312 of the rib 33 being aligned with
the second through hole 38 of the finger 32. One screw 70 is
extended through the fourth through hole 312 and the second through
hole 38 to engage with one nut 72. The rib 33 is thus pivotably
fixed to the finger 32. In the same way, the other ribs 33 are
pivotably fixed to the corresponding fingers 32. The jig is thus
assembled.
[0019] The back plate 50 is generally cross-shaped, and has four
concave surfaces 58 around a perimeter thereof. The back plate 50
also has four posts 54 formed at four extremities thereof
respectively. A through opening 56 is defined in a central portion
of the back plate 50. The back plate 50 is mounted on one side of
the motherboard 60, with the posts 54 engaging with the motherboard
60.
[0020] Referring to FIGS. 2-4, in operation of the jig, the first
end 11 of the shaft 10 is extended through the opening 56 of the
back plate 50 to abut the motherboard 60. The catches 34 of the
claws 30 are engaged with the concave surfaces 58 of the back plate
50 respectively. The sliding hub 20 is moved toward the circular
handle 16 of the shaft 10 by pulling the handlebar 22. The fixed
ends 32b of the fingers 32 are pulled toward the circular handle
16. The ribs 33 are rotatingly pulled radially inwardly by the
fingers 32 toward the shaft 10. An angle between each finger 32 and
the shaft 10 is therefore reduced. The free ends 32a of the fingers
32 are therefore moved radially inwardly toward the shaft 10,
thereby causing the catches 34 to firmly clasp the concave surfaces
58. The sliding hub 20 is continued to be pulled. The fingers 32
clasping the back plate 50 are pulled toward the circular handle
16. The back plate 50 is thus pulled away from the motherboard
60.
[0021] In the present invention, the position of the stationary hub
27 on the shaft 10 is adjustable. The pin 27 can be inserted into
the appropriate retaining hole 14 according to a size of the back
plate 50. For example, when a larger back plate 50 needs to be
removed, the pin 27 is selectively inserted into a retaining hole
14 which is farther from the first end 11. This enables the claws
30 to fit the larger back plate 50.
[0022] It is understood that the invention may be embodied in other
forms without departing from the spirit thereof. Thus, the present
example and embodiment is to be considered in all respects as
illustrative and not restrictive, and the invention is not to be
limited to the details given herein.
* * * * *